Multiple-drill machine



Apr. 24, 1923. 1,452,92 J. McLr-:LLAN

" MULTIPLE DRILL MACHINE Filed May 9, 1922 6 Sheets-Sheet l Apr.. 24, 1923. ,4s2,921 1 J M LEI-LAN MULTIPLE DRILL MACHINE Filed May 9, 1922 6 Sheets-Sheet 2 Apr. 24, 1923.

J. MCLELLAN MULTIPLE DRILL MACHINE 6 Sheets-Sheet 3 Filed May 9, 1922 Apr. 24, 1923.

J MCLELLAN MULTIPLE DRILL MACHINE Filed Mav 9 [Ilm 6 Sheets-Sheet 4 Apr. 24, 1923. 1,452,921

.|.lv1c| s.L.| A|\1 MULTIPLE DRILL MACHINE Filed'May 9, 1922 6 Sheets-Sheet, 5-

111.515 .n..nFuwe www a957/27Wey J. MCLELLAN MULTIPLE DRILL MACHINE Apr. 24, 1923.

Filed' May 9; 1922 6 Sheetse et 6 Fatentecl Alpin 94, 19.23.

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( UNITED STATES PATENT l OFFER' JOI-IN MCLELLAN, OF PROVIDENCE, RHODE ISLAND, kASSIGrNOR,BY'IYIESNE ASSIGBT- l MENTS, TO MULTIPLE DRILLING MACHINE'COMPANY, A CORPORATION OF RHODE ISLAND.

MULTIPLE-DRILL MACHINE.

Application mea my .9,

To all whom it may concern Be; it known-that I, JOHN ',MoLnLLAN, a citizen of-the United States, residing .at Providence, -in ythe county of Providence and State'of Rhode Island, have invented'certai'n neav and: useful.Improvements in Multiple- DrillgMa'chines; of which the following is ;a specification'.` if

. Myinvention relates'to multiple drilling machines oftlie-=oscillatory type, and is an improvement.y` offthatdisclosed inllnited States Patent: No;=,1,075,588`issued to me oet-aa, 1913;

The essential 4objects of myuinvention are to eliminate v`vibration of the drills anddri'ving mechanism; to'enable a regulation ofthe oscillatorytravel of the-driving` element to correspond with the ldegreeof eccentricity or offset .of the drill Shanks; and to prevent cramping ofthe drills in the tool holder or drivingelement.-

Other objects land advantages Will be apparent to those skilled inthe. art hy an examination of this specification.

To the enumerated ends primarily invention resides in Construction andcomliinations which-fall Within thescope ofthe' appended claims;`

4Tn the accomp anying v drawings.y

Figure 1 is aside elevation of my machine,

Figure 2, a front elevation of the same omitting` the fwork holder,

lFigures 3 and 4l, a central vertical longitudinal section. and apartial plan vien7 rea spectively ,of the same, i'

and G-,Grespect-ively of Figure 3.

Figure. 7, a Afragmentary section on lline 7 7 of Figure,

Figure S, a section on lineS-S of Figure 3 showingr parts of thez drivingy chuck broken- Figures 5 and 6. sections. on lines 5--5 The framework of mymachi-ne jin the forrrrA 1 1922. ;Seral;N0. 559,575.

thereof herein illustrated comprises a `loase 2O on .Whichis a standard or bed 21 havingv a rear support. 22 and a front bearing` .23. The frame also yincludes a table or extension 25u connected. to the standard in this instance fby .vertical guides 26 on the front end of the latter on lwhich are movable in dovetailed. guideways 27 laterally projecting-` extensions 28l ari-the former. The table rincludes Walls 29 integral with said Lextensions and Withr 60 ka top or bed 30. A cross piece 81 is located below the hed-inwhich isrotatable the upper i end of an elevating yrod33 Whose lower end has a thread 34 engaging a thread 35 in the orifice 36` of a socket 37 fast to'the `base 20. A bevel gear 39 vfast to the: rod 33 is engaged by gear l() 4on a shaft' 41, With asquared end 4t2 and rotatable in a bearing 43 secured 4in one of theavalls 29 transversely. thereof. By-the describedfmeans the table 25 is vertically adjustable. f f

Fast in the hearing 22 is a shaft Ll5 in this case `provided With a thread-4G to accommodate lock nuts 47, andhaving. an external shouldered journal i9 fnear its lfrontr end. r "On this shaft is revolubly `mounted a pulley A hub portion 53 upon the body of the puli ley is journaled in Jthe front hearing 23.fand

is held therein by a retaining ring' 55 attached to the bearing` by screws 56, and through which a portion of the hub extends. The bore 58 of the; rear end of the' pulleyv accommodates they shaft and shouldered journal 49.* This bore terminates in a for-- Ward direction in an enlarged concentric portion 60. Extending longitudinally of the pulley through its hub portion is a bore 62 .Whose center is slightly eccentricto the center of tliepulley, and which .extends to the enlarged portion 60 of the here 5S; ln the bore 62 is a spindle bushing Gil provided with anend portion 65 of increased diameter whose inner face ahuts against Athe forward end of thevpulleyihulo Said endportion or head.isprovidedwith a peripheral thread 67 engaging an internal thread @Son anec centric counterbalance.ring 70..k The ring is provided with a radially ,disposed threadedliole 71 to receive a screw-,72 .Which reg,`

istersin a semicircular@ pernaher-al;y groove 100 7 3 in the enlargement 65. The spindle bushing 64 is retained Within-the bore 62 by means of a clamping shoe 75 slidable in a cavity 7 6 in the pulley and opening into the bore. Fast to the shoe is a pin 7 7 slidable in a radial hole 78 extending to the periphery of the pulley 51. ln the outer portion of the hole is threaded a set screw 80 adapted to engage the pin 77 by means of which clamping pressure is applied to the shoe 75. A radial pin 81 in the pulley hub' 53 projects into an annular groove 82 in the bushing to which it has accessy through a` longitudinal groove 84 on the periphery of the bushing.

lThe bushing 64 is provided with a longitudinal bore 86 eccentric to its center and adjustably eccentric in a greater degree to the center of the pulley. The bore 86 at its forward end is enlarged as at 87. Loosely mounted in the bore 86 of the bushing is a spindle member 89 having a cylindrical shoulder 90 in the enlargement 87 and provided with a thread 92 upon its end. ln order to retain the spindle in the bushing the rear end 93 of the former is of reduced diameter and has a thread 94 to engage lock nuts which bear against a thrust bearing 96 upon the spindle, which in turn abuts against the end oi" the bushing.

A driving plate chuck 98 has a hub 99 provided with an internal thread 101 engaging the thread 92 of the spindle 89. In the present instance the chuck is rectangular and has a dove-tailed recess 103 in its tace to receive a driving plate 105 which is retained in its seat by a beveled clamping strip 106 engaging its upper margin and which is adj ustably secured to the chuck by screws 107. rlfhe plate has a plurality of transversely disposed holes 109 throughout its area adapted to loosely receive the butt ends of drills 110. Each drill in this case consists, as shown in Figure 10, of a sectional or divided shank comprising a drilling section 112 and an operating section 113; vthe letter being provided with an inclined intermediate portion 114 terminating in an offset butt portion 115. The degree of oli"- set corresponds to the maximum eccentricity of the center of the spindle 89 relative to the center ot the pulley 51. The adjacent ends of the drill sections have threads 116 and 117 respectively. These threads are engaged with an internal thread 119 in a sleeve 120 adapted to join the sections.

A block 122 is longitudinally slidable on dovetailed guides 123 upon the top 30 of the table 25, and is adjustable thereon by means ot a feed screw 125 engaging a` lug 126 on the block 122. rThe top ot the block 122 is provided with a guideway 127 extending transversely of the machine, in which is slidably mounted a bed plate 129 adjustable longitudinally by a `feed screw 131 swiveled in one end thereof and engaging the lug 133 on the block 122. Upon the upper face. of the bed plate 129 near its end are clamping brackets 135 through the base portion 136 of which pass bolts 138 whose heads 139 are slidable in a longitudinal T groove'141 in the bed plate 129, and whose nuts 142 operate upon the base portions 136. The brackets may be adjusted to and from each other and can be maintained in adjusted position by the bolts and nuts. The opposed vertical clamping vfaces 144 of the brackets are broad and are provided with vertical grooves or slots 146.

Mounted on the bed plate 129 between the brackets is a removable drill holder 148. rllhis comprises three parallel rectangular plates 150, 151, 152 spaced from each other at their ends by vertical spacing strips 154 and maintained in engagement relatively to each other by bolts 156 passing through openings 157 and 158 in the plates and strip respectively, and having nuts 159. These three plates are provided with transversely disposed holes 161, the holes in one plate being in alignment with the corresponding holes in the other two plates. The arrangement of the holes in these plates corresponds with the arrangement of the holes 109 of the driving plate 105. The plate 151 extends at cach end beyond its companion plates and forms vertical lateral shoulders 163 on the drill holder 148. These shoulders are slidable in the grooves 146. ln mounting the drills the drill holder is bodily withdrawn from between the brackets, and the parts disassembled b v withdrawing the bolts 156. To assemble the drills and drill holder the drilling sections 112 of all the drills 110 are iirst inserted in the-holes 161 oi the drill plate 150. The sections are alternately ot different lengths. Upon the ends of the shorter sections are now threaded the sleeves 120. The plate 150 is now applied so that the ends of the longer drill i sections pass through alternate holes thereof and are now equipped with their sleeves 120. The plate 152 is now attached together with the spacing strips to the plates 150 and 151. The operation sections 113 of the drills. which sections are of different lengths are now passed through the holes of the plate 152 and alternately through the plate 151 and are threaded into their respective sleeves. This method of assemblage is not exclusive. The drill holder is now returned to place. Y

The plate 152 is provided near each end with a marginalopening- 165 in each olf which is journaled a. stud 166 upon one face ot a guide disk 168 which has upon its opposite tace a diametrically oppositely disposed stud 170. The drill holder is ted towards the drivin@ plate by the rotation of the feed i in' the margins of the driving plate 105 lwherein they are journaled. The guide disks artnet only as spacers but insure accurate parallelism between the drill y holder and driving plat-e thus preventing clamping of Ythe drill shanks; These guide disks have a circular movement corresponding with the movement of the drive plate and drill butts.

A work lioldei,` 174 is provided mounted on :a base 176 slidable on the topA y30 of the rtable and adjustable longitudinally of the table by meansv of a feed screw-178. AV

piece of work 180, as shown in Figure 1, maybe carried lin the' work holder "174; for presentation to the drills.

njc-perationthe pulley 51, to `which the bushing 64 is eccentric, is driven by a belt, and being ,fast to the bushing moves the bushing` in an eccentric path around the i axis of the pulley. The pulley andthe bush-k ing carry the spindle 89 which is eccentric to the center of the bushing, and also eccentrie'ina greater degree to thefaxis of the pulley than it is tothe axis of the bushing in a circular path concentric with the travel of the pulley. The spindle does not rotate on its own axis. The bushing has during the operation of the machine no rotation upon its own axis but the radius of its travel is` somewhat shorter than that ofthe spindle. 7 .It 4,will be observed that there are present in'` this construction two eccentric members rather than one: whereby it is possible to vary `the degree of eccentricity, of the spindle. rlhe driving plate 105 is drivenlby the spindle and therefore is moved in a path corresponding with that of the spindle.`

Therefore the variation of the spindle moveineiitiniparts a corresponding movement to thedriving plate. 1t is evident, therefore, that drills of varying degrees of offset may be employed inthis machine. The method of varying the degree yof eccentricityI of the drivingl parts is as follows.

The screw 80-is loosened relievingpressure upon the clampingshoe 75, thus releasingr the bushing` 64 and'p'erinitting the latter to be rotated in its bore 86. During said rotation 4the radial pin 81 moves in the annular groove V82` but retainsi the bushing against .longitudinal movement. This rotation of the bushino 611 causes the center of the vspindle 89 to travel in a path concentric to the bushing. In Figure 11 is diagrammaticallyshown vthe `iiiagiiinum eccentric position ofthe parts. wherein the center 185 of the spindlel` during the r`ordinary operationr ,of`A

the machine has its; path of movement shown by a broken line circlee186 in the direction,

of the arrows as shownand'around the center of the pulley. lWhen adjusting from the initial position above described the bushing 89 rotates on its own center causing the center 185 of tliespindle to approach the center 187 of the pulley infthe direction of the arrows along the broken vline circle 188, as shown in Figure 12, thus `decreasing the radius or extent of eccentricity from the pulley center.

`lVh'en the spindle 89 is adjusted to any desired, position as described the counter` balance ring 70 must be adjusted to corre-V spond. That is'. the weighted portion 189 of the ring and the center 185 of thespindle 89are diainetrically opposite each other relatively to the centerof thepulley. To adjust the ring'70,-the screw 72 is loosened and the ring turned to the desired point, and f the screw retiglitened. Thus anyvibration which rmight occur due to centrifugal im pulsewill be neutralized.

1. In a multiple spindle drilling machine, a bearing, a pulley ,provided with'anfeccentric bore journaled in the bearing, a bushing in thexbore havingan eccentric bore, a lspindlefree to rotate in the bushing, a drivingplate carried by the spindleprovided with drill. sockets, a tool holder adjacent the plate, and drills comprising bodies rotatably lnfiountedin the holder and offset ends free to rotate inthe socketsy y 2. ln a multiple vspindle drilling machine, a base, ak bearing on the base, a support on the base, a shaft fixed in the` support, a pulley journaledt in the bearingand provided `with an eccentric borereceiving the shaft, a

bushing in the bore having an eccentric bore,

a spindle free .to rotate in the bushing, a

tric bore journaled in the bearing,a bushing in the bore having laneccentric bore,

means in the pulley` for circularly adjusting the bushing-in the bore, a driving plate carried by the spindle* provided with drill sockets, a tool holder adjacent the plate, and drills comprising Lbodies rotatably. mounted in the holder and offsetends free to rotate in the sockets.l

4. 1n a multiplespiiidle drillinginachine, a bearing, a pulley'journaled in the bearing provided withian eccentricbore, a cavity.

opening into vthe bore, ka radial hole extend ing to the cavity, and provided with a thread,

I a bushing mounted in the bore having an eccentric bore, a clamping shoe in the' cavity engaging the bushing, a piniii the -fhole lprovided with a thread engaging the rst thread, a driving plate carried by the spindle provided With drill sockets, a tool holder and drills comprising bodies in the holder and offset ends in the sockets.

In a multiplek spindle drilling machine, a bearing, a pulley journaled in the bearing provided with an -eccentric bore and With an enlarged cavity concentric with the bore., a

30 bushing having an eccentric bore` comprisf ing a shank inthe bore and a head exterior of the pulley` a spindle free to rotate in the shank of the bushing and extending into the cavity, a shoulder on the spindle loose in the hea-d, a thrust bearing on the extended p0rtric bore j ournaled in the bearing, a bushing having an eccentric bore comprising a shank in the bore, and a head exterior of the pulley, a spindle free to rotate in the shank, a shoulder on the spindle loose in the head, a circularly adjustable counterbalance ring on the head, a driving plate carried bythe spindle provided With drill sockets, a tool holder adjacent the plate, and drills comprising bodies rotatably mounted in the holder and 5 offset ends free to rotate in the sockets.

T. In a multiple spindle drilling machine, a bearing, a pulley provided with an eccentric bore journaled in the bearing, a bushing having an eccentric bore comprising a shank in the bore, and a head exterior ofthe pulley provided with a peripheral thread and with an arcuate peripheral groove, an eccentric ring on the head provided with a thread r engaging the rst thread, a clamping screw o in the ringregistering in the groove, a spindle free to rotate in the shank, a shoulder on the spindle free torotate in the head, and a driving plate carried by the spindle provided with drill sockets.

8. In a multiple spindle drilling machine, ua bearing, a pulley mounted in the bearing, a spindle free to rotate in the pulley disposed. eccentrically of the pulley, a driving plate carried by the spindle provided with drill sockets. and with spaced holes. a drill, holder adjacent the driving plate provided with spaced openings, disks intermediate the plate and holder, studs on the disks free to zo rotate in the holes, studs on the disks loose in the openings, and offset drills mounted in the holder extending into the sockets.

9. In a multiple spindle drilling machine, a bearing, a pulley mounted in the bearing,

a spindle free to rotate in the pulley disposed eccentrically to the pulley, a chuck fast to the spindle provided with a dovetailedl recess, a driving plate seated in the recess, a beveled clamping strip in the recess engaging the drivingplate, adjusting screws in the strip engaging the chuck, said driving plate being providedy with drill sockets` a drill adjacent the driving plate, and drills in the holder free to rotate in the sockets.

l0. In a multiple spindle drilling machine, a standard, a support oir the standard, a bearing on the standard, a shaft in the support, a pulley mounted in the bearing and on the shaft, a spindle loosely supported in the pulley eccentrically thereto, a driving plate fast to the spindle provided with drill sockets, vertical guides on the standard, a table slidably engaging the guides, means for vertically feeding the table, longitudinal guides on the table, a block slidably mounted on the guides and provided with a guidevlay transversely of the machine, means for feeding the block, a bed plate slidably mounted in the guidervay, means for feeding the bed plate, a drill holder carried by the bed plate, and drills in the holder adapted to register in the drill sockets.

ll. In a multiple spindle drilling machine, a frame, a bearing on the frame, a pulley journaled in the bearing provided with an eccentric bore, a spindle in the bore, a driving plate carried by the spindle provided with drill sockets, a bed plate supported by the frame provided With a longitudinal T slot, spaced brackets resting on the bed plate, bolts in the brackets registering in the slots, a drill holder on the bed plate embraced by the brackets, and drills in the holder loosely seated in the sockets.

12.In amultiple spindle drilling machine, a frame, a bearing on the frame, a pulley journaled in the bearing provided With an eccentric bore, a spindle in the bore, a driving plate carried by the spindle provided with drill sockets, a bed plate supported by the frame, spaced brackets carried by the bed plate provided with vertical grooves, a drill holder comprising a plurality of plates, marginal spacing strips between the plates, bolts connecting the plates and spacing strips, one of said. plates registering in the grooves and all of said plates resting on the bed plate, and all of said plates being provided With transverse drill holes, and drills in said holes loosely seated in the drill sockets.

13. In amultiple spindle drilling machine, a frame, a bearing on the frame, a pulley journaled in the bearing provided with an eccentric bore, a spindle in the bore, a drive ing plate supported by the spindle provided with drill sockets, a drill holder supported by the frame comprising a plurality of parallel vertical plates spaced from each other provided with series of drill holes, drills mounted 5 in the holes comprising drill sections provided With threaded ends and operating sections provided with threads at one end and offset portions at the other end seated in the drill sockets, and threaded sleeves engaging the threaded ends of the drill sections and opl0 erating sections.

In `testimony whereof I have affixed my signature.

JOHN MCLELLAN. 

